The Circle of Inevitability," is complete, and many articles include updates about its events and developments, which contain major spoilers. It's recommended to leave this wiki if you haven't finished reading.
I won’t help you protect the living creatures you wish to protect, but I won’t harm them either… It’s not that I won’t keep my promises, but it’s just that they’re too weak and not worth my attention…
„
— A familiar yet unfamiliar ravings echoed in Klein's heart on Lord of Mysteries, Chapter 1380
“The Immortal Lord of Heaven and Earth for Blessings;
The Sky Lord of Heaven and Earth for Blessings;
The Exalted Thearch of Heaven and Earth for Blessings;
The Celestial Worthy of Heaven and Earth for Blessings.”
In a time more ancient than the Modern Era of the Pre-Epoch, the sleeping Original Creator had naturally split into multiple personas. "They" were also in a state of slumber, but "They" began to use the authority and Beyonder Characteristics "They" controlled to influence the world, making many preparations for the true dissociation which would occur when the Original Creator awakened. Among the multiple personas, Primordial God Almighty and The Celestial Worthy of Heaven and Earth were the most powerful and active Great Old Ones on Earth.[4] In the Modern Era, "He" seized various people in cocoons in the Sefirah Castle as part of his preparation.
In the early-mid stages of the First Epoch, Primordial God Almighty and The Celestial Worthy had used different methods to grasp the additional Sefirot and tried to accommodate those additional Sefirot. The Celestial Worthy accomodated the River of Eternal Darkness and the Nation of Disorder.[5] This made "Them" exceed the limit of the Pillar - the highest level of stability one can achieve - and made "Their" inclination to converge more intense, making it impossible for "Them" to control "Themselves", and began taking actions against each other. No one, not even the Seven Lights of the Spirit World, knows the exact situation of the battle. After the battle, both Pillars perished. Primordial God Almighty ripped off the Uniqueness of the Error Pathway from The Celestial Worthy, and "His" corpse formed the First Blasphemy Slate in the Chaos Sea with the Error Uniqueness next to it; while The Celestial Worthy sealed all Sefirot apart from the Sefirah Castle and the Chaos Sea to the Western Continent. This was a part of "His" plan for resurrection: by sealing the Sefirot, the Gods of other pathways would have to help someone to reach either Lord of Mysteries or God Almighty (to either remove or break the Western Continent’s seal, respectively) before "They" could obtain the Sefirot "Themselves" to become a Great Old One. Then, "He" would have a high chance to awaken inside the new Lord of Mysteries.[4][6][7][8]
As another plan for "His" resurrection, "He" arranged for Sefirah Castle to release certain people in the cocoons when certain requirements were met. The person released would directly be accompanied with a "curtain" containing a set of Sequence 9 to 1 Beyonder characteristics of the Fool Pathway and would instantly elevate them to the level of an Angel and thus would have a high chance of The Celestial Worthy of Heaven and Earth awakening inside "Them". But something went wrong and "He" wasn't able to resurrect as planned. It was only until the late Fifth Epoch that the Sefirah Castle started to be able to fix the issue.[4]
In the Fourth Epoch, after Antigonus lost control, "His" self-awareness was no longer able to suppress The Celestial Worthy’s will in "Him". The two psyches got stitched together, revealing a most primitive, most instinctual, and also most bloody and crazy side. Since The Celestial Worthy is the former owner of Sefirah Castle, the present Antigonus can indirectly influence Sefirah Castle by using this identity very naturally. The Evernight Goddess made use of this to indirectly affect Sefirah Castle to "Tamper" the Beyonder characteristic that accompanied Klein's transmigration to the Forsaken Land of the Gods, preventing the instant awakening of The Celestial Worthy in him.[4]
In The Fool's Gambit, Klein was pushed by Amon to the point where he had to release the will of The Celestial Worthy inside him to prevent Amon from winning. Even though he managed to achieve victory against Amon in the end, he had to enter a deep sleep afterwards to fight and fuse with the remaining will of The Celestial Worthy. The people inside the cocoons in Sefirah Castle, the transmigrators, were released by Klein before his sleep. From then, The Celestial Worthy and Klein had been contending against each other within The Fool's Dream.
It can be speculated that "He" was active on Earth at least as early as the Qin or Han Dynasty of the Pre-Epoch based on the fact that "His" Honorific Name and a corresponding ritual to enter the Sefirah Castle was recorded in a book named "Quintessential Divination and Arcane Arts of the Qin and Han Dynasty", which was eventually obtained by Klein in the Modern Era.[11]